Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds genuinely new behavioral context: the accepted CIDR size ceilings (IPv4 up to /16, IPv6 up to /48) and the shape of what comes back, including the network's owner. It doesn't say whether results are capped or paginated for large blocks.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, no filler, with the return contents and the hard size limits front-loaded before the use-case hint. Every clause carries information an agent would otherwise have to discover by trial.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema, the description carries the burden of describing return fields, and it does so adequately (score, report count, last report time, owner). The remaining gap is result-volume behavior for large CIDR blocks, which matters for a tool that enumerates addresses.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so both parameters are documented structurally, making 3 the baseline. The description goes beyond that by constraining the meaning of the network parameter with maximum prefix sizes that the schema itself does not state, which prevents oversized-query failures. The maxAgeInDays window is left entirely to the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource — enumerating every reported address inside a CIDR block, with score, report count, last report time and network owner. It is clearly distinct from check_ip (single address), but it never distinguishes itself from the sibling get_network_report, which an agent could plausibly confuse it with.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

"Use it to judge a whole hosting range or subnet" gives a clear selection context, implying this is the bulk/range tool versus a single-IP lookup. There are no explicit exclusions and no named alternatives such as check_ip or get_network_report, so the agent must infer the routing.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.